Hydraulic press



May 26; 1.925-

J. J. BERRIGAN HYDRAULIC Pnss- Filed Nov. 14. 1925 Jttorng GRT Patented May 26, 1925.

UNITED sTATEs PATENT OFFICE.

JOHN J. BERBIGAN, 0F CHICAGO, ILLINOIS, ABSIGNOB Ol' ONE-THIRD T0 JOHN B. BERBIGAN AND ONE-THIRD TO XATHERYNE P. IALON, BOTH OI CHICAGO,

ILLINOIS.

HYDRAULIC PRESS.

Application led November 14, 1988.- Serial lo. 874,608.

To all whom, it may concern.'

Be it known that I JOHN J. BERRIGAN, a citizen of the United tates, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Hydraulic Presses, of which the following is a specification.

This invention relates to a hydraulic press and particularly to .a double hydraulicv press. It has for one object to provide a double hydraulic press utilizing a single pressure creating means and constructed so that this means may be used to press one side while the other is being filled, and may then be used to compress the second side while the rst is being emptied.

Heretofore hydraulic presses of large capacity have been all single, that is to say, there has been a single pressure creating 'means for each press. When the press is filled, the compression action is commenced. This is of comparatively short duration. As soon as sullicient compression has been attained, the press is opened and emptied. The emptying operation and the subsequent filling operation require considerably longer time than does the pressing, and thus during the greater part of the time the compression device is idle. In my invention I have provided means whereby the compression device is connected to two sections of a double press. While one section is being filled, the other section is in the pressing operation, and as soon as that section is completely compressed and while it is being emptied, the other side is subject to compression. 1n operation most of the t1me, and the operation of the press is very much more economical both with regard to power and labor.

My invention is illustrated more or less diagrammatically in the accompanying drawing, wherein:

Figure l is a partial side elevation showing the press;

Figure 2 is a longitudinal vertical cross section on an enlarged scale showing the bag mounting arrangement;

Figure 3 is a vertical section showing an end of one of the bags;

Thus the com ression device is.

Fi re 4 is a vertical cross section taken on llne 4-4 of Figure 1 on an enlarged scale. v v Like parts are indicated by like characters throughout.

The press roper is mounted on a frame work. This rame work is made up of end pieces A A, only one of which is here shown and side channels A1 A1 which are connected to the end pieces. Mounted between the side channelsl A1 A1 is a' hydraulic ressure cylinder B. This cylinder is provi ed with a pair of upper, laterally extending flanges B1` B1 and a corresponding lower pair of flanges B2 B2. The upper` flanges extend laterally and lie upon the tops of the side channels A1. T he lower flanges B2 engage the under face of the side channels. The pressure cylinder B is thus mounted so that 1t can slide along the channels with relation to the frame of the press.` the channels A1 are erforated at suitable points as at A2 A2 an the flanges B1 B2 ,are also perforated as at BS1 B. be inserted through the perforations above mentioned and the -cylinder is thus] held against lateral displacement. When the) pins are removed the cylinder may be moved so as to bring the perforations in the flanges in register with the perforations in 'the channel and the pin may then -be replaced and the cylinder hel-d against further movement. By this means the cylinder may be moved to' different positions along the frame.

A piston C is mounted within the cylinder. It is provided with a rod C1 which extends laterally from it and out through the head of the pressure cylinder.

The cylinder is normally held substantially in the middle of the press. Mounted on one side, on the right as it appears in Figure 1, is a platen D, having laterally extendingflanges D1, the upper of which flanges rest upon the channels A1 and the lower of which contact the under face of the channel and serve to guide the platen.

The flanges of This platen is fixed to the rod C1 and operported within the press in any suitable manner, but as here shown are notched on their sides so as to extend over and rest upon the channels A1. Extending between the platens D D2 and engaging each of the partitions E are a plurality of chains E1. lhese chains serve to space the partitions when the press is open. Other spacing means might be provided but I prefer to use the spacing chu-ins shown.

Fastened to the flanges D1 and extending downwardly from them and enclosing the channels A1 are a pair of plates F. The flanges D1 are perforated and a pin may be inserted through these perforations, and through the perforations in the flanges' of the channels A1 to hold the platen against displacement. The platen, however, 1s not held against displacement except when the pressure cylinder B is free to move.

Either the cylinder or the piston is moved laterally backwards and forwards during the pressing operation. When one is to be moved, the other is fixed. Each is mounted so that it can be fixed, but only one, of course, is held against movement at one time. As shown in Figure 1 the cylinder is fixed and the piston is free to move.

Secured to the platen D and mounted to move with it are one or more rods G, These rods extend through perforations in the platen D2 and are themselves perforated as at G1.

The channels A1 are perforated as at AIl and through these perforations a pin A* may be inserted. Against this pin the platen D2 will rest and the pressing effect 1s exerted upon the pin. By this means the platen D2 may be held against the pressing movement in a number of different positions. l Lying between the partitions E E are a plurality of bags H H. These bags as shown are perforated in their sides and these perforations are in register with perforations in the partitions E. A short length of pipe H1 H1 passes through the perforations in the bags and the perforations in the partitions and is held in position b nuts H2 which also grip the fabric o the cloth and hold it in position. Each of the bags is provided in its top with a tape or fabric strip H3. This strip passes over the upper end of one of the partitions E and is held in position there by means of a spring clip H4. 'Ilhis construction is designed to prevent the accidental displacement of the bags when the press is empty or being emptied or being filled.

The bags themselves are in fact open ended tubes. Extending across each end of each tube on each side is a pocket I. Within this pocket a thin plate of metal I1 is inserted. When the bag is to be filled the end is closed bringing the two plates to- -J are one or more rods L.

olded over twice. The pressure of the material within' the bag as the bags are filled and as pressing commences tends to force the end of the bag against the partition, and thus as the pressure increases the seals at the ends of the bags become ether, and the yendl of .the tube is then of the platen D. Mounted also so as to move with the cylinder B and the platen These rods correspond exactly to the rods G and operate in the same manner. M M are flexible connections by means of which pressure, hydraulic or otherwise, is forced first to one side of the cylinder and then to the other so as to move either the cylinder back and forth or the piston. l

N is a flexible connection by means of which material to be pressed is pumped into the bags, as shown on theiffright in Figure 1. Through this connection the bags are filled first one and then the other until the entire series is filled. The connection is then closed and the pressing may commence. A similar connection is used on the other side of the press for filling that side.

Although I have shown an operative device, still it will be Vobvious that many changes in size, shape and arrangement of parts might be made without departing materiallv from the spirit of my invention; and I wish therefore that my showing be talren as in a sense diagrammatic.

Where in the claims and specification the words pressing` assemblv are used, it means the essential parts of the pressing apparatus. for example, a pair of platens and the material holding parts between themi As applied to Figure 1 a pressing assembly would constitute the platens D D2 and the bags and holding means between them.

The use and operation of my invention are as follows:

When it is 'desired to use the press, both sides may be opened. They may then be filled simultaneously. Then assuming that the side to the right in Figure 1 is to be pressed first, the following operation will be carried out. The cylinder will be fixed by means of the insertion of the pin B5. When the press is full, theplaten Dz will occupy the position shown in dotted lines in Figure 1 and indicated by X. Pressure is then applied so as to move the piston out- Ward, thus moving the platen D toward the right and compressing the entire contents of the press against the platen D2 which rests against the end of the press. When the piston is moved outward its full excurslon. pressure is stopped and a small pin G2 is inserted in one of the perforations G1 of the rods G. Pressure is then put upon the opposite side of the piston so as to withdraw it into the cylinder, moving with it the entire press, since the platen D is fastened to the platen D2 by means of the rods G. The entire right side of the press is then moved to the position shown in full lines in Fi ure 1. Then a pin A* is placed in the ho e A3. Pressure is then again reversed, the platen D moving toward the laten D2, pressing the contents against t is platen, which 1n this case is held ,bythe pinA. This operation may be re ated several times,` each time compresslng the press through a distance equal to the effective length of the pressure cylinder and then moving the press inward and recompressing through the same distance.

l.Vhen this operation is complete and the contents have been sufliciently compressed, the press is opened and may be emptied. As soon as it is opened the platen D is held against movement by the insertion of a pin, and the pin B5 is removed so that the pressure within the cylinder will cause the cylinder to move backward and forwards and by this means the left side of the press is compressed in the same step by step movement.

During this operation, however, the right side of the press is emptied and refilled, and thus the crew of the press is able to fill one side while the other is being compressed, and as soon as the pressing is finished they can empty that side and proceed with the pressing of the other.

I claim:

1. In a press, a plurality of pressin assemblies, and a single pressure app ying means adapted to operate alternately on each of said pressing assemblies, the other remaining stationary during that operation.

2. In a two part press a two part pressure applying means, each part of said pressure applying means being fastened to one part of said press and means whereby either half of the press may be compressed while the other remains stationary.

3. In a ress, a plurality of pairs of platens, an a sing e ressure apply' means adapted to act a ternately on eac pair of platens, and means for moving each of said pairs of platens together throu h a distance greater than the effective lengt o Vsaid pressure applying means.

4. n a press, a plurality of pressin assemblies, and a slngle pressure app ying means adapted toV operate alternately on each of said pressing assemblies, the other remaining stationary during that operation, and means for compressing each of said pressing assemblies through a distance greater than the effectivev length of the said pressure applying means'.

5. In a press, a plurality of pairs of platens each of said platens being movable and a pressure cylinder, and means for applying said pressure cylinder to compress first one of said platens and then the other.

6. In a hydraulic press, a plurality of pairs of platens and a single hydraulic cylinder and means for applying said cylinder to compress alternately each of said pairs of platens, and means for compressing said pairs of platens throughout a distance greater than the effective length of said hydraulic cylinder.

7. In a press a twol part pressure ap lying means, means for securing each of said) parts against movement, a pair ofplatens on each side of said pressure applying means, one of said platens being secured to one of s ad parts, and the other of said platens being secured to another ofsaid parts,'each of said parts adapted to move, to move the laten to which it is attached when the ot er of said parts is held against movement.

8. n a hydraulic press, a main supporting frame, a hydraulic cylinder mounted therein., a piston and piston rod adapted to move within said cylinder, means for securing said piston to said frame to prevent its movement and means for securing said cylinder to the frame to prevent its movement, a pair of platens on each side of said cylinder, one of said platens bein secured to the cylinder, and another of sai platens being secured to the piston, said piston adapted to be reciprocated and to move the laten to which it is attached when the cy inder is held against movement, and said cylinder adapted to be reciprocated and to move the platen to which it 1s attached when said piston is held against movement.

Signed at Chicago county of Cook and State of Illinois, this 12th day of November JOHN J. BERRIGAN. 

